| CAMBRIDGE DISPLAY TECHNOLOGY LTD. Patent applications |
| Patent application number | Title | Published |
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| 20110032232 | Pixel Circuit - A pixel driver circuit for active matrix driving of an organic light emitting diode (OLED) comprises a drive transistor having a current path connected to a first voltage supply line at one end and to an OLED at the other end and a gate terminal connected to a storage element connected between gate and source of the drive transistor to memorize a drive signal for the drive transistor under the control of a first switch transistor having a gate connection to a first selection line and a current path connected between gate and drain of the drive transistor, and a second switch transistor having a gate connection to a second selection line, wherein the second switch transistor has a current path connected to the data line at one end and a node at the other end located between the drive transistor and the OLED. | 02-10-2011 |
| 20100308274 | Pulsed Driven Light Emissive Device and Composition Therefor - A pulsed-driven device, such as a display, comprises an organic light-emitting composition comprising a host material and a blended or bound phosphorescent emitter. The phosphorescent emitter is present in the host material at a concentration of greater than 10 wt. %, and the host material has a higher triplet energy level than the phosphorescent emitter. The concentration at which the phosphorescent emitter is at peak efficiency in the host material is greater than 10 wt. %, and the composition does not include a fluorescent emitter, so that emission from the composition in use is substantially all phosphorescence. | 12-09-2010 |
| 20100264408 | Organic Thin Film Transistors, Active Matrix Organic Optical Devices and Methods of Making the Same - A method of manufacturing an organic thin film transistor, comprising: providing a substrate comprising source and drain electrodes defining a channel region; forming a patterned layer of insulting material defining a well surrounding the channel region; depositing a protective layer in the well; subjecting exposed portions of the patterned layer of insulating material to a de-wetting treatment to lower the wettability of the exposed portions; removing the protective layer; and depositing organic semiconductive material from solution into the well. | 10-21-2010 |
| 20100259518 | Matching Current Source/Sink Apparatus - A current matching control apparatus for matching a plurality of current sources and a plurality of current sinks, the plurality of current sinks having a drive current value controlled by a drive processor in accordance with a reference control current and wherein each output of the plurality of current sinks are connected to a common output node; a feedback circuit having an input connected to the common output node and an output connected to the drive processor, wherein the feedback circuit is arranged to match a voltage at the common output node to a reference voltage by communicating a signal to the drive processor to adjust the reference control current. | 10-14-2010 |
| 20100253710 | Pixel Driver Circuits - This invention relates to pixel driver circuits for active matrix optoelectronic devices, in particular OLED (organic light emitting diodes) displays. We describe an active matrix optoelectronic device having a plurality of active matrix pixels each said pixel including a pixel circuit comprising a thin film transistor (TFT) for driving the pixel and a pixel capacitor for storing a pixel value, wherein said TFT comprises a TFT with a floating gate. | 10-07-2010 |
| 20100237341 | ORGANIC ELECTROLUMINESCENCE ELEMENT - An organic electroluminescence element having a cathode as a top electrode, and excelling in luminance efficiency, drive voltage, and operational life is provided. The organic electroluminescence element includes an anode over a substrate and a luminescent layer over the anode. The luminescent layer comprises an organic material. An electron injection layer is over the luminescent layer for injecting electrons into the luminescent layer. The electron injection layer is a metal including at least one of an alkaline metal and an alkaline earth metal. A fullerene layer is over the electron injection layer and includes fullerenes and at least one of an alkaline metal and an alkaline earth metal. The at least one of the alkaline metal and the alkaline earth metal included in the fullerene layer has a lower work function than a lowest unoccupied molecular orbit energy level of the fullerenes. A cathode is over the fullerene layer. | 09-23-2010 |
| 20100227434 | Method of Fabricating a Self-aligned Top-gate Organic Transistor - A method of fabricating a self-aligned top-gate organic transistor comprises depositing a photoresist material over the dielectric material, and exposing the photoresist material to irradiation through the substrate using the source and drain electrodes as a mask. The exposure defines a region for deposition of the gate electrode. | 09-09-2010 |
| 20100032662 | Organic Thin Film Transistors - A method of forming an organic thin film transistor comprising: providing a structure comprising source and drain electrodes with a channel region therebetween, a gate electrode, and a dielectric layer disposed between the source and drain electrodes and the gate electrode; and patterning the dielectric layer using the source and drain electrodes as a mask to form a region of dielectric material in the channel region which is thinner than regions of dielectric material adjacent the channel region. | 02-11-2010 |
| 20090152531 | Polar semiconductor hole transporting material - A semiconductive hole transport material containing polar substituent groups, the polar substituent groups substantially not affecting the electronic properties of the hole transport material and the hole transport material being soluble in a polar solvent. | 06-18-2009 |
| 20090096363 | ELECTROLUMINESCENT DEVICES - An electroluminescent device comprising: a first charge carrier injecting layer for injecting positive charge carriers; a second charge carrier injecting layer for injecting negative charge carriers; and a light-emissive layer located between the charge carrier injecting layers and comprising a mixture of: a first component for accepting positive charge carriers from the first charge carrier injecting layer; a second component for accepting negative charge carriers from the second charge carrier injecting layer; and a third, organic light-emissive component for generating light as a result of combination of charge carriers from the first and second components; at least one of the first, second and third components forming a type II semiconductor interface with another of the first, second and third components. | 04-16-2009 |
| 20090017191 | ELECTROLUMINESCENT DEVICES WITH ELECTRODE PROTECTION - A method of manufacturing an electroluminescent device which has an anode and a cathode and arranged between the anode and the cathode a light emissive layer, also includes an anode protection layer which protects the anode against the effects of converting a precursor polymer to a semiconductive conjugated polymer which constitutes the light emissive layer. This has been found to increase the brightness and half-life of devices. | 01-15-2009 |
| 20080297039 | BACKLIT DISPLAYS INCLUDING ORGANIC LIGHT-EMISSIVE MATERIAL - A display device comprising: a light switching unit comprising an array of pixels each operable to vary the transmission of light therethrough; and a backlight comprising a first series of regions of organic light-emissive material having a first emission colour and a second series of regions of organic light-emissive material having a second emission colour, each region of organic material being located so as to lie behind a plurality of pixels of the array in the viewing direction for backlighting those pixels; and at least one of the regions of organic light-emissive material being formed by a process of ink-jet deposition. | 12-04-2008 |
